微信支付，最难的地方不在于技术，而是在于微信有一套自己的技术规范。
建议每位同学都要从官方文档看起。 虽然市面上有一些集成工具，例如 Ping++ , 但是往往这些产品不是特别方便，收费也比较高昂。 出了问题不好调试。
所以，我们对于核心技术，一定要亲自掌握。
申请微信账号和配置
这里就不详述了。 我们假设全部的账号都已经做好了。
1. 添加支付页面的路由
import Pay from '@/components/pay'
Vue.use(Router)
export default new Router({
routes: [
{
path: '/shops/pay',
name: 'Pay',
component: Pay
},
]
})
2. 添加vue页面
<template>
<div class="background">
<header class="top_bar">
<a onclick="window.history.go(-1)" class="icon_back"></a>
<h3 class="cartname">订单支付</h3>
</header>
<div class="tast_list_bd" style="background-color: #F3F3F3; padding-top: 0; padding-bottom: 80px;">
<div class="goods_detail" style="">
<main class="detail_box">
<span class="divider"></span>
<form style="margin-top: 45px;">
<div class="column is-12">
<label class="label">收货人</label>
<p class="control has-icon has-icon-right">
<input name="name" v-model="mobile_user_name" v-validate="'required|required'" :class="{'input': true, 'is-danger': errors.has('name') }" type="text" placeholder="例如: 张三" autofocus="autofocus"/>
<span v-show="errors.has('name')" class="help is-danger">收货人不能为空</span>
</p>
</div>
<div class="column is-12">
<label class="label">收货地址</label>
<p class="control has-icon has-icon-right">
<input name="url" v-model="mobile_user_address" v-validate="'required|required'" :class="{'input': true, 'is-danger': errors.has('url') }" type="text" placeholder="例如: 北京市朝阳区大望路西西里小区4栋2单元201"/>
<span v-show="errors.has('url')" class="help is-danger">收货地址不能为空</span>
</p>
</div>
<div class="column is-12">
<label class="label">收货电话</label>
<p class="control has-icon has-icon-right">
<input name="phone" v-model="mobile_user_phone" v-validate="'required|numeric'" :class="{'input': true, 'is-danger': errors.has('phone') }" type="text" placeholder="例如: 18888888888"/>
<span v-show="errors.has('phone')" class="help is-danger">电话号码不能为空</span>
</p>
</div>
</form>
<span class="divider"></span>
<section class="product_info clearfix" v-if="single_pay">
<div>
<div class="fu_li_zhuan_qu" >
<img :src="good_images[0]" class="logo_image"/>
<div class="content" >
<div class="title">
{{good.name}}
</div>
<div class="logo_and_shop_name">
<div class="product_pric">
<span>￥</span>
<span class="rel_price">{{good.price}}</span>
<span>   x {{buy_count}}</span>
</div>
</div>
</div>
</div>
</div>
</section>
<section class="product_info clearfix" v-else v-for="product in cartProducts">
<div>
<div class="fu_li_zhuan_qu" >
<img :src="product.image" class="logo_image"/>
<div class="content" >
<div class="title">
{{product.title}}
</div>
<div class="logo_and_shop_name">
<div class="product_pric">
<span>￥</span>
<span class="rel_price">{{product.price}}</span>
<span>   x {{product.quantity}}</span>
</div>
</div>
</div>
</div>
</div>
</section>
<section>
<span class="divider" style="height: 15px;"></span>
<div class="extra_cost" style=" ">
<span style="float: left; margin-left: 15px;"> 卖家留言:</span>
<input v-model="guest_remarks" id="extra_charge" type="text" name="cost" placeholder="选填: 对本次交易的说明" style="border: 0; background-color: white;
font-size: 15px; color: #48484b; outline: none; width: 60%;"></input>
</div>
</section>
<section>
<span class="divider"></span>
<div class="extra_cost" style=" ">
<span style="float: left; margin-left: 15px;"> 应付金额:</span>
<div v-if="single_pay" class="rel_price" type="text" name="cost" style="border: 0; background-color: white;
font-size: 20px; color: #ff621a; font-weight: bold; outline: none; text-align: right; padding-right: 20px;"> \{\{ total_cost | currency }}</div>
<div v-else class="rel_price" type="text" name="cost" style="border: 0; background-color: white;
font-size: 20px; color: #ff621a; font-weight: bold; outline: none; text-align: right; padding-right: 20px;"> \{\{ total | currency }}</div>
</div>
</section>
</main>
<span class="divider"></span>
<div style="height: 55px; display: flex; width: 100%; padding: 0px 10px; background-color: #fff;" @click="">
<div style="flex: 1; display: flex;">
<div style="margin-top: 10px;">
<img src="../../assets/微信icon@3x.png" style="width: 35px;"/>
</div>
<span style="margin-top: 8px; font-size: 18px; line-height:40px; margin-left: 10px;">微信支付</span>
</div>
<div style=" padding: 14px 10px;" @click="user_wechat">
<img src="../../assets/选中3x.png" style="width: 28px;"/>
</div>
</div>
</div>
</div>
<div class="shop_layout-scroll-absolute" style="">
<div class="queding" @click="buy">
立即支付
</div>
</div>
</div>
</template>
<script>
import { go } from '../../libs/router'
import { mapGetters } from 'vuex'
export default{
data(){
return {
good_images: [],
good: "",
buy_count: this.$route.query.buy_count,
good_id: this.$route.query.good_id,
open_id: this.$store.state.userInfo.open_id,
mobile_user_address: '',
mobile_user_name: '',
mobile_user_phone: '',
guest_remarks: '',
is_use_wechat: false,
}
},
watch:{
},
mounted(){
if (this.single_pay) {
this.$http.get(this.$configs.api + 'goods/goods_details?good_id=' + this.good_id).then((response)=>{
console.info(this.good_id)
console.info(response.body)
this.good = response.body.good
this.good_images = response.body.good_images
},(error) => {
console.error(error)
});
}
},
computed: {
total () {
return this.cartProducts.reduce((total, p) => {
return (total + p.price * p.quantity)
}, 0)
},
single_pay () {
return this.good_id && this.buy_count
},
total_cost () {
return this.good.price * this.buy_count
},
...mapGetters({
cartProducts: 'cartProducts',
checkoutStatus: 'checkoutStatus'
})
},
methods:{
validateBeforeSubmit() {
//拦截异步操作
return new Promise((resolve, reject) => {
this.$validator.validateAll().then(result => {
console.info(result)
if (result) {
console.info("============表单验证成功===")
resolve(true);
} else {
alert('请填写完整的收货信息!');
resolve(false);
}
});
})
},
plus () {
this.buy_count = this.buy_count + 1
},
minus () {
if(this.buy_count > 1) {
this.buy_count = this.buy_count - 1
}
},
user_wechat () {
if (this.is_use_wechat === false) {
this.is_use_wechat = true
} else {
this.is_use_wechat = false
}
},
buy (){
let result = this.validateBeforeSubmit().then((resolve)=>{
if (resolve) {
console.info('true ==== ')
let params
if (this.single_pay) {
params = {
good_id: this.good_id,
buy_count: this.buy_count,
total_cost: this.total_cost,
guest_remarks: this.guest_remarks,
mobile_user_address: this.mobile_user_address,
mobile_user_name: this.mobile_user_name,
mobile_user_phone: this.mobile_user_phone,
open_id: this.open_id
}
} else {
console.info(this.total)
params = {
goods: this.cartProducts,
total_cost: this.total,
guest_remarks: this.guest_remarks,
mobile_user_address: this.mobile_user_address,
mobile_user_name: this.mobile_user_name,
mobile_user_phone: this.mobile_user_phone,
open_id: this.open_id
}
}
this.$http.post(this.$configs.api + 'goods/buy', params
).then((response) => {
let order_number = response.body.order_number
this.purchase(order_number)
}, (error) => {
console.error(error)
});
} else {
console.info('== 请填写完整的收货信息')
}
});
},
purchase (order_number) {
//调起微信支付界面
if (typeof WeixinJSBridge == "undefined"){
if( document.addEventListener ){
document.addEventListener('WeixinJSBridgeReady', this.onBridgeReady, false);
}else if (document.attachEvent){
document.attachEvent('WeixinJSBridgeReady', this.onBridgeReady);
document.attachEvent('onWeixinJSBridgeReady', this.onBridgeReady);
}
}else{
this.onBridgeReady(order_number);
}
},
onBridgeReady (order_number) {
let that = this
let total_cost
if (this.single_pay) {
total_cost = this.total_cost
} else {
total_cost = this.total
}
this.$http.post(this.$configs.api + 'payments/user_pay',
{
open_id: this.$store.state.userInfo.open_id,
total_cost: total_cost,
order_number: order_number
}).then((response) => {
WeixinJSBridge.invoke(
'getBrandWCPayRequest', {
"appId": response.data.appId,
"timeStamp": response.data.timeStamp,
"nonceStr": response.data.nonceStr,
"package": response.data.package,
"signType": response.data.signType,
"paySign": response.data.paySign
},
function(res){
// 下面代码仅用于调试
// alert("res.err_msg: " + res.err_msg + ", err_desc: " + res.err_desc)
if(res.err_msg == "get_brand_wcpay_request:ok" ) {
// 使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回 ok，但并不保证它绝对可靠。
that.$router.push({ path: '/shops/paysuccess?order_id=' + order_number });
} else {
// 显示取消支付或者失败
that.$router.push({ path: '/shops/payfail?order_id=' + order_number });
}
}
);
}, (error) => {
console.error(error)
});
}
},
}
</script>
核心代码如下：
onBridgeReady (order_number) {
//....
this.$http.post(this.$configs.api + 'payments/user_pay',
{
open_id: this.$store.state.userInfo.open_id,
total_cost: total_cost,
order_number: order_number
}).then((response) => {
WeixinJSBridge.invoke(
'getBrandWCPayRequest', {
"appId": response.data.appId,
"timeStamp": response.data.timeStamp,
//....
},
function(res){
//...
}
);
}, (error) => {
console.error(error)
});
}
上面的代码是用来给页面一准备好( WeixinJSBridge 准备好了)的时候，页面就要调用的。
purchase (order_number) {
//调起微信支付界面
if (typeof WeixinJSBridge == "undefined"){
if( document.addEventListener ){
document.addEventListener('WeixinJSBridgeReady', this.onBridgeReady, false);
}else if (document.attachEvent){
document.attachEvent('WeixinJSBridgeReady', this.onBridgeReady);
document.attachEvent('onWeixinJSBridgeReady', this.onBridgeReady);
}
}else{
this.onBridgeReady(order_number);
}
},
上面的代码用于调用出 “微信支付页面”. 其中的变量 WeixinJSBridge 是微信浏览器自带的变量， 不必声名，直接拿过来用就行。
看效果
微信的支付页面会跳出来 （图略）
总结
可以看到：
1、 微信支付的细节处理，都交给了后台服务器端只要我们H5端把参数准备好，直接访问http://shopweb.siwei.me/api/payments/user_pay就可以了；
2、 微信支付，分成单笔商品支付和多笔商品支付两种情况.区别就是把参数重新组织一下即可；
3、 新手对于WeixinJSBridge这个变量很难掌握，一定要多看文档这个文档是“微信公众号内支付”的文档，不是微信APP，或者微信普通H5的文档一定要梳理好逻辑另外，对于后端API的同学这里更难，建议多查多试；
4、 在微信的后台，要配置不同的支付目录安卓和IOS的粗略是不一样的建议大家百度一下；
5、 微信的支付场景对应的支付方式和实现方式是不一样的本例是“微信的公众号内支付”；
微信的官方文档中， 提供的例子都是基于经典的WEB页面（整体刷新的那种）的，目前还没有看到SPA的例子。 但是大家的问题很多。 我的个人博客也记录了一些内容： http://siwei.me/blog/posts/--27
由于篇幅限制，微信相关的内容不再赘述。
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